农业环境科学学报Issue(9)：1715-1721,7.DOI:10.11654/jaes.2015.09.013
土壤洗脱与光降解技术联合修复氯丹和灭蚁灵污染场地土壤的研究
Remediation of Chlordane and Mirex-contaminated Soil by Combined Soil Washing and Photodegradation Technique
摘要
Abstract
Organochlorine pesticides(OCPs)in soil have posed severe risks to the environment and human health. In this paper, the use of soil washing coupled with photodegradation for the remediation of soil contaminated with chlordane and mirex was investigated. In the soil washing experiment, sixteen solubilizing agents were tested for their washing efficiencies. It was found that Triton X-100, Tween 80 and HPCD had good washing efficiencies for chlordane and mirex. Since the chromophoric aryl group in Triton X-100 could absorb ultraviolet light, which might promote the photodegradation of chlordane and mirex, Triton X-100 was selected for optimizing parameters for washing chlordane and mirex from soil. The optimum parameters for Triton X-100 were 10 mmol·L-1 of concentration, 60 min of washing period, 1:10 of soil to washing agent ratio, and three successive washings. Under the optimum conditions, the removal efficiencies of chlordane and mirex from contaminated soil were 98.7%and 45.3%, respectively. The eluate obtained was then subjected to photodegradation. Under the irradiation of Hg lamp, chlordane was completely degraded within only 3 h and nearly 100%of mirex was degraded in only 1 h. The present results suggest that soil washing combined with photodegradation could be a useful option for the remediation of soil contaminated with chlordane and mirex.关键词
氯丹/灭蚁灵/污染场地土壤/Triton X-100/光降解Key words
chlordane/mirex/contaminated soil/Triton X-100/photodegradation分类
资源环境引用本文复制引用
徐君君,郑冠宇,徐峙晖,占新华,周立祥..土壤洗脱与光降解技术联合修复氯丹和灭蚁灵污染场地土壤的研究[J].农业环境科学学报,2015,(9):1715-1721,7.基金项目
国家自然科学基金（21477055）；国家高技术研究发展计划（863）项目 （）
